Interpretation : The solutions are to be arranged in order of decreasing acidity.
Concept Introduction : Acids are substances that contain hydrogen and ionize to produce hydrogen ions
Answer to Problem 95A
The solutions are arranged in order of decreasing acidity is given below:
Explanation of Solution
Consider
Since sodium hydroxide is a strong base and entirely dissolves in water, the pH rises, reducing the acidity of the sodium hydroxide solution.
Consider
Since hydrochloric acid is a strong acid and dissociates into cation and anion thereby increasing the hydrogen ion and so the pH drops. So, this is the strongest acid.
Consider
The salt known as ammonium chloride is made up of an anion from a strong acid and a cation from a weak base. So, it is the second strongest acid.
Consider
An anion of a weak acid and a cation of a strong base make up sodium ethanoate.
This is third strongest acid.
So, the order of decreasing acidity is as follows:
Chapter 19 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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